The polarized photoacoustic spectra of Rhodobacter sphaeroides cells embedded in polymer and strongly irradiated by polarized radiation

Title:

The polarized photoacoustic spectra of Rhodobacter sphaeroides cells embedded in polymer and strongly irradiated by polarized radiation

Creator:

Goc, J. and Klecha, K.

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:b9ae52ff-3c9a-43ff-bc79-026b12795136
uuid:b9ae52ff-3c9a-43ff-bc79-026b12795136
issn:0300-3604
doi:10.1023/A:1015103015297

Subject:

absorption, bacteriochlorophyll, carotenoids, chromophore, light-harvesting complex, purple photosynthetic bacteria, and thermal deactivation

Type:

model:article and TEXT

Format:

bez média and svazek

Description:

The cells of purple photosynthetic bacterium Rhodobacter sphaeroides embedded in stretched polymer films were irradiated by strong polarized "white light" with an electric vector parallel to the direction of film stretching. The polarized absorption and photoacoustic spectra before and after strong irradiation were measured. Measurements of absorbance showed no confident anisotropy before and after strong irradiation. In contradiction, the photoacoustic method showed after strong irradiation some changes in anisotropy of thermal deactivation due to the perturbation of the fate of excitations. The increase in yield of thermal deactivation, higher in a region of light-harvesting complex 2, can be explained by the irreversible changes in the conformation of the complexes due to strong irradiance reported up to now predominantly for thylakoid antenna complexes. and J. Goc, K. Klecha.

Language:

Multiple languages

Rights:

http://creativecommons.org/licenses/by-nc-sa/4.0/
policy:public

Coverage:

461-465

Source:

Photosynthetica | 2001 Volume:39 | Number:3

Harvested from:

CDK

Metadata only:

false